(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In a sample of one litre of carbon dioxide at STP an average of 5 disintegrations

C -> N + e + v

are observed per minute. Calculate the atomic fraction of C present if the mean lifetime of this nucleus is 8267 years.

2. Relevant equations

[tex]\tau[/tex] = [tex]\omega[/tex]^{-1}= 8267 years

N(t) = N_{0}* [tex]e[/tex]^{-[tex](\omega[/tex] * t)}

3. The attempt at a solution

First I found [tex]\tau[/tex] = 2.607 * 10^{11}seconds.

And really I'm at a loss of where to go next. I figure N(t)/N_{0}is what im looking for but I cannot solve for this without knowing the time t and I do not know where the 5 disintegrations per minute comes in. I'm not looking for an answer(already know it), i just want a little push in the right direction.

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# Homework Help: Nuclear Decay

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